| 时间 | 值 （百万吨公里） | 世界排名 |
|---|---|---|
| 2016 | 77458318 | 13 |
| 2015 | 76846126 | 13 |
| 2014 | 72189961 | 13 |
| 2013 | 64072322 | 14 |
| 2012 | 58727125 | 15 |
| 2011 | 50555805 | 15 |
| 2010 | 43855539 | 16 |
| 2009 | 34402844 | 13 |
| 2008 | 37940321 | 13 |
| 2007 | 33187839 | 15 |
| 2006 | 28836949 | 16 |
| 2005 | 26522315 | 16 |
| 2004 | 25948923 | 15 |
| 2003 | 22723072 | 15 |
| 2002 | 20892156 | 14 |
| 2001 | 20301199 | 13 |
| 2000 | 17687894 | 15 |
| 1999 | 18600400 | 15 |
| 1998 | 15223700 | 16 |
| 1997 | 20419000 | 13 |
| 1996 | 22117100 | 12 |
| 1995 | 26524800 | 9 |
| 1994 | 28933100 | 7 |
| 1993 | 36124000 | 4 |
| 1992 | 62173900 | 3 |
| 1991 | 128760600 | 2 |